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There is a thing called heavy water. It is pure water that has a deuterium in it known as D20 instead of H20. It is pure but does not have the same mass.
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∙ 15y ago
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Should the density of Al be the same for all Al samples?
The density of pure aluminium is the same for all samples.
The density of a substance is the same for all samples of the substances?
Density is simply the mass divided by volume. This means that it is the amount of the substance in a specific unit of space. Because a pure substance indicates that it is exactly that, a substance made of a specific combination of elements, it will always have the same density because those elements can only take one form in order for it to be pure.
What is the principle of common proportions?
The relative proportions of ions in sea water are constant. In other words, the percentage accounted for by each ion is always the same. This implies that the oceans are chemically well-mixed and that ocean salinity varies almost entirely as a result of the addition or removal of pure water, not the addition or removal of salts. - A.J. F
How can you use Dalton's atomic theory to explain why every sample of pure substance has the same properties?
Dalton's atomic theory states that a pure substance is made up of tiny particles called 'atoms', and that each atom of a substance will be identical in shape, size and behavior to any other atom of that substance, regardless of source or location. Any two samples of a pure substance will demonstrate the same properties because all of these samples are comprised of identical atoms which behave identically.
Does distilled boil faster than pure water?
distilled water and pure water are the same thing.
Are there different water masses?
pure water has the same density, and the same mass
Does all pure water have the same mass and volume?
No.
Are all samples of water have the same composition of hydrogen and oxygen?
All pure water is the same, but most water we use has other things in it. For example mineral water has minerals.
Should the density of Al be the same for all Al samples?
The density of pure aluminium is the same for all samples.
Is The density of a substance is the same for all samples of the substance?
Not necessarily. The temperature of the samples would have to be the same. It can also vary with how pure the substance is.
Which is more dense 1 mL of water or 50 L of water?
The answer is: No. Density is a property of a substance, and doesn't depend on the size of the sample. Samples of different sizes all have the same density, as long as they're all samples of the same substance, their compositions are all the same, and the conditions are the same in every case. (Samples of ice and water have different density, because the conditions are different.)
Why do two samples with the same substance with the same volume HAVE to have the same mass?
Because they are of the same substance they have the same density density = mass/volume
The density of a substance is the same for all samples of the substances?
Density is simply the mass divided by volume. This means that it is the amount of the substance in a specific unit of space. Because a pure substance indicates that it is exactly that, a substance made of a specific combination of elements, it will always have the same density because those elements can only take one form in order for it to be pure.
Why are all samples of a given substance have the same intensive properties?
The properties of a pure substance do not vary from sample to sample because there is no reason for them to. Why would they? Water is water, and if you take any sample of water from any stream, lake or ocean and remove all the "stuff" in it to leave only the water, all the samples will behave the same way physically and chemically. The chemical properties of a substance (and the physical ones, too) are set by what the substance is. And these properties define the way the substance behaves in the universe as a whole. There is no reason for any water found on, say Mars, to behave any differently than any water here on Earth - or anywhere else in the universe.
What is the principle of common proportions?
The relative proportions of ions in sea water are constant. In other words, the percentage accounted for by each ion is always the same. This implies that the oceans are chemically well-mixed and that ocean salinity varies almost entirely as a result of the addition or removal of pure water, not the addition or removal of salts. - A.J. F
According to the law of definite proportions any two samples of KCl have?
They will have the same mass.
How did Archimedes find out the crown wasnt gold?
By studying the displacement of water caused by pure gold and silver of the same mass, he proved that the gold crown was not of pure gold as claimed by the jeweller.
